Antifrictional bearing



{June 1936. c. M. TowNsENb A 2,045,933

ANTIFRI CTIONAL BEARING Original Filed Jan. 13, 59,32 p' 7? INVENTOQ CLAUDE wat A T Toe/vars.

Patented June 30, 1936 UNITED STATES PATENT OFFICE ANTIF RICTIONAL BEARING Claude Mortimer Townsend, Birmingham, England January 13, 1931 3 Claims.

The invention embodied in this application is a part of that described and illustrated in United States Letters Patent No. 1,970,439, issued August 14, 1934, this application being a divisional application of the one of the serial number aforesaid. 7

According to this invention an anti-frictional bearing for a straight line moving load has the following combination of parts, namely, an enclosing casing, two tables adapted for separate revolution within said casing, anti-frictional means supporting said tables within said casing both as to axial and transverse thrusts, a roller mounted diametrically across said tables one end of said roller being supported upon one table and the other end of said roller being supported upon the other table, and means stationarily positioning said roller in relation to said casing and said tables.

The invention also embodies a constructional arrangement in which the roller revolving'upon said tables for support is adapted to swivel about the tables to any angle in a plane at right-angles to the axes of the tables.

Fig. 1 is a section of one form of the invention.

Fig. 2 is a section of another form of the invention.

Fig. 3 is a diagram showing an application of the bearing Fig. 2.

With reference to Fig. 1 a single cylindrical roller 7' forms a load member for the straight,

line moving load. This roller is mounted upon two revoluble tables e, el situated in the same casing a and in the same plane, each of the tables e, el, having a diiferent axis of rotation within said casing. The one end of the roller 7' contacts the table e, while the other end of said roller contacts the table ei. The ends of the roller are permanently but loosely located within the casing a by pivot ends 7'2 of said casing 11. It therefore follows that when the roller 7' is revolved by a straight line moving load the tables e and el separately revolve at different rates of speed to accommodate the speed of the roller 7'.

The form of the invention Fig. 2 is substantially the same as the form Fig. 1 but the roller jl forming the load member extends diametrically across the bearing for support. The end 7'3 of this roller contacts the table at while the end i l of this roller contacts the table e4 and is free of the table e3. The two tables e3 and 64 are concentrically mounted so that the roller 7' I can swivel about said tables to any angle in a plane at right-angles to the axes of the two tables.

Fig. 3 shows two hearings or supports Fig. 2 applied obliquely to a base i for the purpose of anti-frictionally supporting a V-slide it, such as the sliding table-of a planing machine, this showing an adaptation of the invention to a machine.

With reference to Fig. 1, a single cylindrical roller 7' forms a load member for the support of a straight line moving load. This roller 9' is 10 mounted on two revoluble tables e, e situated in the same casing a and in the same plane, each table having a different axis of rotation within said casing.

The table e, of largest diameter, forms a rigid part of a ring 7 which is anti-frictionally mounted within thecasing (1. upon a ring of balls g running upon a base ring h fixed to said casing, so that this ring 1, together with the table 6, as one-piece, is anti-frictionally supported with- 20 in the casing both as regards axial and transverse thrusts, that is to say, the table, except for revolution, is immovable by the manner in which it is mounted on the ball bearings g. The table e forms a rigid part of a ring 2 applied by 5 a circle of ball bearings l to a base ring 111. rigidly resting upon the bottom of the casing 01. so that this table 6' is both axially and transversely supported concentrically to the part n, which extends between the body and lid of the casing. 30 The one end of the roller 9' rests upon the table e and the other end of said roller upon the table e, and therefore when the said roller revolves about its own axis the tables e and e revolve independently at diiferent speeds about their par- 35 ticular axes of revolution and upon the respective ball bearings g and l. The ends of the roller 1' are permanently but loosely located within a housing 0 of the upper part of the casing a. by pivot ends 9'2, carried by said casing a, loosely 40 but permanently engaging pivot centers in the ends of the roller, for the purpose of locating the roller only in relation to the tables, but when said roller 7' is revolving from a straight line moving load the pivot ends are clear of it and 45 the Whole weight of the load is borne by the two tables e and e.

The form of the invention in Fig. 2 is substantially similar to that shown in Fig. 1. The roller y'l shown in Fig. 2 and forming the load 50 member, extends diametrically across the bearing and is rotatably mounted with reference to the casing al while the roller 7' of Fig. 1 is fixedly mounted for rotation on the casing a. The end 7'3 of this roller contacts the table e3, while 55 the end 7'4 of this roller contacts the table e4. The two tables 63 and e4 concentrically mounted in the casing al instead of eccentrically as in the form of invention shown in Fig. 1, so that the roller y'l can swivel about the tables to any angle in a plane at right angles to the axes of both tables, but when the roller 71 is being revolved only about its own axis the tables e3 and ed revolve about their axes. As the diameter 7'3 bearing against the table 63 is less than the diameter 9'4 bearing against the tablee l, the two tables 63 and 64 will revolve, at different speeds. The table e3 forms a rigid part of a ring fl which is anti-frictionally mounted upon a ring of balls gl running upon a ring hi. The table e4 forms supported upon one table and the other end of said roller being supported upon the other table. 2. An anti-frictional bearing for a straight line moving load, comprising a casing, two eccentrically mounted tables adapted to revolve sepaa rigid part of a ring it carried by ball bearings ll upon a base ring ml.

Figure 3 shows an application of bearings to a planing machine comprising a table 11. and the base t. end of a bed and table of the planing machine. In such case a number of bearings would be applied at distances apart along the bed for the table to rest and work upon with a straight line motion. Even if the two bearings a, 1i are obliquely disposed in such case, the movement of the V-slide u is still in a straight line upon the base if, the Weight of the slide it being equally distributed between the bearings. Even if there should be a slight tendency of an axial thrust upon the load rollers it would be taken care of by the one table in one direction and the other table in the other direction of each of. the two bearings.

Having now described my invention, what I Figure 3 is an end elevation showing the rately within said casing, anti-frictional means supporting said tables within said casing both as to axial and transverse thrusts, and a roller fixedly mounted for rotation on said casing diametrically across said tables, one end of said roller being supported upon one table and the other end of said roller being supported upon the other table.

3. An anti-frictional bearing for a straight line moving load, comprising a casing, two concentrical tables adapted to revolve separately within said casing, anti-frictional means supporting said tables Within said casing both as to axial and tranverse thrusts, a roller mounted diametrically across said tables, one end of said roller being supported upon one table and the other end of said roller being supported upon the other table, and means connected with said roller for maintaining the operative position thereof in relation to said two tables.

CLAUDE MORTIMER TOWNSEND. 

